General Electric Company

Other

Copolymer Rubber & Chemical Corporation

Chemical, Inc.

Copolymer Rubber

Shrikant V Phadke

Errol J Olivier

Charles F Pratt

Thermoplastic polyester, copolyester and polyblend molding compositions impact-modified by glycidyl methacrylate grafted EPDM exhibit high impact strength combined with good knit-line characteristics, when the grafted comonomer content exceeds 2 percent by weight in the impact modifier, it has a gel content in the range of from about 10 to about 80 weight percent.

Olefinic impact modifiers for, and blends with, thermoplastic polyester

A molding composition having improved toughness and impact strength comprising 60-90 percent by weight of a matrix resin in the form of a polyester or polyamide resin, reacted with 40-10 percent by weight of a rubber formed by copolymerization of ethylene, one or more mono-olefins, and preferably one or more polyenes, and an ester of an alpha, beta-unsaturated acid having an epoxide functionality on the alkoxy portion. The composition is prepared by forming a masterbatch containing the backbone rubber, a monomer having the epoxide functionality, a catalyst and a portion of the matrix resin of the final composition in a single step bulk process, and thereafter blending the masterbatch with the remainder of the matrix resin.

Single step bulk process for high impact polyester masterbatches,

Olefinic impact modifiers for, and blends with, thermoplastic polyesters

An epoxy functionalized copolymer and/or interpolymer rubber prepared in a bulk reaction for use as a modifier for improving the impact and knitline strength of thermoplastic resins.

Epoxy containing impact modifiers for thermoplastic resins

This invention is an improvement over the copending Olivier application Ser. No. 537,789, now U.S. Pat. No. 4,594,386, filed Sept. 30, 1983 and entitled 'Polyamide Grafted EPM Blend'. This invention relates to the further improvement in impact strength and toughness of polycaprolactams and other polyamide based resinous compositions and to a new and improved method for the manufacture of same.

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Baton Rouge, LA, United States of America

Shrikant V Phadke